Compaq StorageWorks UltraSCSI RAID Enclosure (DS-BA370 Series) User's Guide (EK-BA370-UG. C02, September 1998)

Storage Devices
UltraSCSI RAID Enclosure 7–7
Prerequisites for Replacing a Disk Drive SBB
Replacing a disk drive SBB is a relatively simple procedure.
However, there are several things to consider.
When an array controller initializes a storage device, it establishes the
device’s physical location, the device address, and the LUN.
Physically moving the device causes the bus to become erratic.
Use the disk drive SBB bezel label to identify the device model,
LUN, device address, array controller bus, and other device specific
characteristics.
Caution
To protect this sensitive electronic device from ESD, use the
following precautions:
• Wear an ESD wrist strap.
• Do not touch the printed circuit board or the backplane
connector.
• Do not lay the device on a work surface; place it on an
electrostatic mat.
• Place the device in an electrostatic bag for shipment.
Disk Drive SBB Replacement Methods
There are three methods for replacing disk drive SBBs: hot swap,
warm swap
, and cold swap. Before replacing a device, determine the
appropriate replacement method based upon the capabilities of the
array controller.
Caution
The methods for replacing Compaq array controllers and
cache modules are device dependent. Refer to the array
controller documentation or release notes for detailed
instructions.